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(No Model.) 5 Sheets-Sheet 1. H. MQGORNAGK. GENTRIFUGAL SEPARATOR.

Patented June 8,1897.

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(H0 Model.) 5 sheetssheet 2. H. MOGORNAGK. GENTRIPUGAL SBPARATOR.

No. 584,231. Patented June 8,1897.

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(No Model.) 5 Sheets-Sheet 3. H. MGCORNACK. CENTRIFUGAL SEPARATOB.

Patented June 8,1897.

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H. MQCORNAGK GENTRIPUGAL SEPARATOR No. 584,231. Patented June 8, 1897.

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(No Model.) 5 Sheets-Sheet 5. H. MOGORNAOK. GBNTRIFUGAL SEPARATOR IInventor.-

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UNITED STATES PATENT EEicE.

HERBERT MCCORNACK, OF IVEST CHESTER, PENNSYLVANIA, ASSIGN OR TO PHILIPM. SHARPLES, OF SAME PLACE.

CENTRIFUGAL SEPARATOR.

SPECIFICATION forming part of Letters Patent No. 584,231, dated June 8,1897'.-

Application filed December 9, 1895.

To all 1071,0122, it may concern-s Be it known that I, HERBERTIMCCORNAOK, a citizen of the United States, and a resident of lVestChester, Pennsylvania, have invented certain Improvements in CentrifugalSeparators, of which the following is a specification.

My invention relates to that class of centrifugal separators which areemployed for To separating liquids of different densities, such as creamand milk, and in which the liquid mass in the rapidly-rotated bowl isdivided by one or more partitions into different volumes, in each ofwhich a partial separation takes place, the object of my presentinvention being to provide for communication between the diderentvolumes of liquid in such a way that liquid may pass from one volume toanother without any material disturbance of the natural Stratificationor lamination due to the action of centrifugal force upon the portionsof different specific gravity which constitute the mass. This object Iattain by providing for free communication between the mass of liquid onone side of the partition and that on the other side of the same onlines concentric with the axis of rotation of the bowl, so thatcorresponding strata or lamina: in each volume are in constantcommunication with each other on the lines in which they naturallydispose themselves under centrifugal action, and hence the concentrationof the cream or lighter portion of the liquid mass upon the inner wallof the same and the flow of the skim-milk or heavier portion of the massto the outer portion of the bowl are not attended with any materialdisturbance of the various strata 0r laminae.

In the accompanying drawings, Figure 1 is a vertical section of anordinary form of centrifugal cream-separator, illustrating, theapplication of my invention thereto. Fig. 2 is a sectional plan view onthe line 2 2, Fig. 1. Fig. 3 is a vertical section similar to Fig. 1,but illustrating a modified form of partition structure. Fig. 4 is asectional plan view taken on the line a 4, Fig. 3. Fig. 5 is averticalsection of another form of centrifugal separator embodying my invention.Fig. 6 is a perspective view of the same on a smaller scale. Fig. '7 isa sectional plan view on the Serial No. 571.568. (No model.)

line 7 7, Fig. 5, but on a larger scale than said figure. Fig. 8 is avertical sectional view of still another form of separator, illustratingmy invention; and Fig. 0 is a sectional plan 5 5 view on the line 9 9,Fig. 8.

In Figs. 1 to 4, A represents a centrifugal separator-bowl of well-knownform, this bowl comprising a lower cylindrical portion, above which is aconical portion surmounted by a contracted cylindrical portion or neck,this bowl being mounted upon an expanded conical base B, which formspart of a central tube B. The bowl is confined to the base by a nut 13on the tubular shaft, which nut bears upon the top of the contractedneck of the bowl, and a packing-ring a is interposed between the bowland the base B in order to form a tight joint. The base I) of the bowlhas a central depending supporting and driv- 7o ing spindle B Within thebowl is the usual pipe b, conimunicating with the outer portion of thebowl and leading thence upward to and through the contracted neck, saidpipe serving for the discharge of the skim-milk, and in the top of thecontracted neck is a contracted radial slot d, into which projects aset-screw d, the inner end of which determines the point at which thecream discharges from the bowl, so that by turning the screw in onedirection or the other the cream-discharge line can be varied asdesired.

The tubular shaft B serves as the milk-inlet, the full milk beingintroduced thereinto through an opening in the top of the nut B andbeing discharged therefrom through suitable radial openings f.

Within the bowl is a conical partition I), which fits snugly at itslower end to the enlarged base 13 of the bowl and is caused to rotatetherewith in any suitable manner, as, for instance, by means of a pin g,carried by the base and projecting into a slot or notch in the lowerportion of the partition, as shown 5 in Fig. 1.

The bowl A has the usual in Wardl y-projecting blade or vans A forinsuring the rotation of theliquid mass therewith, and the partition Dhas a hollow rib i projecting inwardly from the outer shell of thepartition to a point inwardly beyond the line of the cream-discharge, asshown in Figs. 1 and 2,.this hollow rib insuring the rotation of theliquid mass contained within the partition.

The chamber t" within the hollow rib is in free communication with theinterior of the bowl A, the mouth of the rib being crossed only by anarrow bridge-piece m, serving as a brace or stiffener. Hence the volumeof liquid within the chamber 2' is to be regarded as a part of thatcontained within the outer separating-chamber A -that is to say, thechamber between the partition D and the outer shell of the bowl.

The side walls of the hollow rib '1; do not extend completely downwardto the base B of the bowl. Hence a flow-passage p is formed between saidbase B and the lower edges of the side walls of the hollow rib, thisflow-passage extending from the outer shell of the partition to theinner end or base of the rib, or at least to a point close to or insideof'the line of cream-discharge and serving to provide free communicationbetween the liquid mass con tained in the chamber D within the partitionand the mass contained in the chamber 2' of the hollow rib.

In the operation of the device the full milk is discharged from thetubular shaft or spindle B through the openings f into the chamberD'within the partition D, and thence flows through the channels 13 intothe chamber 1" of the hollow rib and thence into the bowl.

When the bowl is rotated, the centrifugal action causes separation ofthe mass of full milk into various concentric strata or laminae ofdifferent specific gravity, the heaviest strata being outermost and thelightest innermost.

The use of the partition D is for the purpose of causing a primary orpartial separation and a secondary separation, the primary separationtaking place in the chamber D within the partition and the secondaryseparation being accomplished in the chamber A of the bowl outside ofsaid partition.

By providing the partition with a hollow rib which is in freecommunication with the mass of liquid in the bowl and is also in freecommunication with the mass of liquid in the chamber D within thepartition on lines concentric with the axis of rotation of the bowlperfect communication of the two masses is effected, since thestratifieation or lamination of the mass within the chamber 4 of thehollow rib must be precisely the same as that of the mass within thechamber D, and the strata in one chamber can communicate freely onconcentric lines with the strata in the other chamber. Hence there is nocommingling or disturbance of the different strata by compelling one toforce its way radially through another in order to find a means ofescape.

In Figs. 1 and 2 I have illustrated the partition D as having but asingle hollow rib; but it will be apparent that the number of thesehollow ribs may be increased to any desired extent without departingfrom the essential purpose-or principle of my invention. In Figs. 3 and4 I have shown an instance of an extreme embodiment of the idea ofmultiple ribs. In this case the shell which constitutes the equivalentof the partitionshell D of Fig. 1 is in the form of a series ofradiating fingers D flaring outwardly from top to bottom, as shown inFig. 3, and each inclosing a chamber D this series of chambers Dconstituting the equivalent of the single chamber D of Fig. 1, in thatthe primary or partial separation is effected therein. The spaces ibetween the fingers D constitute the equivalents of the chamber withinthe hollow rib dot" the structure shown in Fig. 1, and these chambers icommunicate with the chambers D. through flow-passages p at the base ofthe structure in substantially the same manner and for the same purposeas the communication is established between the chambers 71 and D ofFig. l by means of the flow-passage p. In these views of the drawings Ihave also illustrated, in connection with the winged partition structureD an outer and similarly winged supplementary partition structure F,which surrounds the partition structure D extends part way throughoutthe height of the same, and flares outwardly from bottom to top, thechambers D within the hollow wings F serving as separating-chambers andcommunicating over the top of said partition structure F with thechambers 1 formed between the wings of said structure F. In this caseprovision is made for a primary or partial separation in the chambers Dfor a secondary or further separation in the chambers D and for a thirdor final separation in the chamber A within the bowl, and thismultiplication of separating actions may be carried to any desiredextentwithont departing from my invention.

In Figs. 5, 6, and 7 I have illustrated an embodiment of my invention inwhich the separator consists of a simple upright tube or cylinder G,rotated by means of a jet of motive fiuid acting on an impact-wheel G orin any other available manner, and having at the top a skim-milk outlet19 and a creamoutlet d controlled by a set-screw (1 In the cap of thecylinder is also formed a central channel or passage 3 for the inflow ofthe full milk, and within the cylinder is a partition structure J,consisting of three plates so disposed in respect to each other as toform a triangular structure with projecting flanges at the angles, whichflanges bear upon the walls of the cylinder G, and are riveted orotherwise suitably secured together. This triangular structure is ofsuch dimensions that the cream-discharge line, which is represented bythe dotted circle in Fig. 7, falls within the angles of the structure,these portions of the chamber within the partition be- ,ing in freecommunication with the chamber surrounding the partition and within thecylinder Gthrough flow-passages p at the base centric lines.

of the separator. When the full milk is introduced in to the structureJ, primary or partial separation takes place in each of the chamberswithin the angles of the structure and outside of the cream-line, andthese separating-chambers have free communication on lines concentricwith the axis of rotation with the secondary separating-chamber Gsurrounding the partition, so that there is in this machine, as in themachines previously described,constant communication of the strata inthe preliminary separatingchambers with the corresponding strata in thesecondary separating-chamber, with the same attendant good results.

here the partition structure is a daring one, the flow passage orpassages between the successive separating-chambers is preferably atthat portion of the partition structure having the greatest diameter. Thus it is at the bottom of the partitions D D and at the top of thepartition F. here the partition is of uniform diameter or dimensionsthrough out, the flow-passage may be at either end, but it should bypreference be at the end opposite that which receives the full milk-forinstance, in the structure shown in Fig. 5 the partition structurereceives the full milk at the top and the communicating passages are atthe bottom.

In all of the machines previously described thesecondaryseparating-chamber surrounds the primary separating-chamber,but this construction is not necessary to the proper carrying out of myinvention, as the latter is equally applicable to separators in whichthe successive separating-chambers are side by side.

In Figs. 8 and 9 I have shown a separator in which theseparating-chambers are thus arranged and are separated from each otherby partitions having flow-passages at top or bottom providing forcommunication between the successive separatingchambers on con- Thus 1is the inlet-chamber and 6 the outlet-chamber of the separator, thechamber 1 communicating through a flowpassage beneath the partition 1*with the chamber 2 and the latter communicating through a flow-passageabove the partition with the chamber 3, which communicates through aflow-passage beneath the partition 3 with the chamber a, and so on, thechamher 5 communicating through a flow-passage beneath the partition 5with the outlet-chamber 6, which has a skinrmill; outlet 12 and acream-discharge groove (i with adj mistingscrew (Z Having thus describedmy invention, I claim and desire to secure by Letters Patent 1. Acentrifugal separator having a separating-bowl with one or more internalpartitions disposed as described to provide successiveseparating-chambers and form one or more flow-passages extending fromthe creamwall at the inner portion of the chamber bounded by thepartition to the outer portion of said chamber, and providing forcommunication on lines concentric with the axis of rotation between themasses of liquid in the successive separating-chambers.

2. A centrifugal separator having a separating-bowl with an internalpartition disposed as described to provide for primary and secondaryseparation of the liquid mass, said.

partition having one or more hollow ribs each forming a flow-passageextending from the cream-wall atthe inner portion of the chamber boundedby the partition to the outer portion of said chamber, and providing forcommunication on lines concentric with the axis of rotation between themasses of liquid in the primary and secondary chambers.

3. A centrifugal separator having a separating-bowl with an internalflaring partition disposed therein as described so as to cause primaryand secondary separation of the liquid mass, and forming one or moreflow-passages located at the wide end of the partition and extendingfrom the cream-wall at the in ner portion of the chamber bounded by saidpartition to the outer portion of said chamber and serving to affordcommunication on lines concentric with the axis of rotation between theseparating-chamber within the partition and that outside of the same.

4. A centrifugal separator having a separating-bowl with a series ofpartitions disposed therein as described to form successiveseparating-chambers side by side, and flowpassages extending from thecream-wall at the inner portion of the chambers bounded by saidpartitions to the outerportion of said chambers, and providing forcommunication on lines concentric with the axis of rotation between themasses of liquid in the successive separating-chambers.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing Witnesses.

WILLIAM S. WINDLE, A. E. WonnALL.

